/** * NXT bootstrap interface; NXT Bootstrap control functions. * * Copyright 2006 David Anderson * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #include #include #include #include "samba.h" static nxt_error_t nxt_format_command2(char *buf, char cmd, nxt_addr_t addr, nxt_word_t word) { snprintf(buf, 20, "%c%08X,%08X#", cmd, addr, word); return NXT_OK; } static nxt_error_t nxt_format_command(char *buf, char cmd, nxt_addr_t addr) { snprintf(buf, 20, "%c%08X#", cmd, addr); return NXT_OK; } static nxt_error_t nxt_write_common(nxt_t *nxt, char type, nxt_addr_t addr, nxt_word_t w) { char buf[21] = { 0 }; NXT_ERR(nxt_format_command2(buf, type, addr, w)); NXT_ERR(nxt_send_str(nxt, buf)); return NXT_OK; } nxt_error_t nxt_handshake(nxt_t *nxt) { uint8_t buf[2]; nxt_send_str(nxt, "N#"); nxt_recv_buf(nxt, buf, 2); if (memcmp(buf, "\n\r", 2) != 0) { nxt_close(nxt); return NXT_HANDSHAKE_FAILED; } return NXT_OK; } nxt_error_t nxt_write_byte(nxt_t *nxt, nxt_addr_t addr, nxt_byte_t b) { return nxt_write_common(nxt, 'O', addr, b); } nxt_error_t nxt_write_hword(nxt_t *nxt, nxt_addr_t addr, nxt_hword_t hw) { return nxt_write_common(nxt, 'H', addr, hw); } nxt_error_t nxt_write_word(nxt_t *nxt, nxt_addr_t addr, nxt_word_t w) { return nxt_write_common(nxt, 'W', addr, w); } static nxt_error_t nxt_read_common(nxt_t *nxt, char cmd, int len, nxt_addr_t addr, nxt_word_t *word) { char sbuf[20] = { 0 }; uint8_t rbuf[4] = { 0 }; assert(len <= 4); NXT_ERR(nxt_format_command2(sbuf, cmd, addr, len)); NXT_ERR(nxt_send_str(nxt, sbuf)); NXT_ERR(nxt_recv_buf(nxt, rbuf, len)); /* The value returned is in little-endian byte ordering. */ *word = rbuf[3] << 24 | rbuf[2] << 16 | rbuf[1] << 8 | rbuf[0]; return NXT_OK; } nxt_error_t nxt_read_byte(nxt_t *nxt, nxt_addr_t addr, nxt_byte_t *b) { nxt_word_t w; NXT_ERR(nxt_read_common(nxt, 'o', 1, addr, &w)); *b = (nxt_byte_t)w; return NXT_OK; } nxt_error_t nxt_read_hword(nxt_t *nxt, nxt_addr_t addr, nxt_hword_t *hw) { nxt_word_t w; NXT_ERR(nxt_read_common(nxt, 'h', 2, addr, &w)); *hw = (nxt_hword_t)w; return NXT_OK; } nxt_error_t nxt_read_word(nxt_t *nxt, nxt_addr_t addr, nxt_word_t *w) { return nxt_read_common(nxt, 'w', 4, addr, w); } nxt_error_t nxt_send_file(nxt_t *nxt, nxt_addr_t addr, const uint8_t *file, unsigned short len) { char buf[20]; NXT_ERR(nxt_format_command2(buf, 'S', addr, len)); NXT_ERR(nxt_send_str(nxt, buf)); NXT_ERR(nxt_send_buf(nxt, file, len)); return NXT_OK; } nxt_error_t nxt_recv_file(nxt_t *nxt, nxt_addr_t addr, uint8_t *file, unsigned short len) { char buf[20]; NXT_ERR(nxt_format_command2(buf, 'R', addr, len)); NXT_ERR(nxt_send_str(nxt, buf)); NXT_ERR(nxt_recv_buf(nxt, file, len + 1)); return NXT_OK; } nxt_error_t nxt_jump(nxt_t *nxt, nxt_addr_t addr) { char buf[20]; NXT_ERR(nxt_format_command(buf, 'G', addr)); NXT_ERR(nxt_send_str(nxt, buf)); return NXT_OK; } nxt_error_t nxt_samba_version(nxt_t *nxt, char *version) { char buf[3]; strcpy(buf, "V#"); NXT_ERR(nxt_send_str(nxt, buf)); NXT_ERR(nxt_recv_buf(nxt, (uint8_t *)version, 4)); version[4] = 0; return NXT_OK; }